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15English
6. Calibraon
The device is pre-calibrated and should be re-calibrated only by qualied techni-
cians. A calibraon screw is provided at the rear of the device for this purpose.
Cauon! Calibrate the device only if you have the necessary technical
experse and equipment!
7. Operaon and commissioning
Take the appliance out of the packaging and remove all the packaging material.
Open the baery compartment at the back of the device and insert three 1.5 v
AAA baeries. Then close the baery compartment cover. Press and hold the
"ON/OFF" buon for 3 seconds to switch on the device.
Measuring the sound level:
Press the ON/OFF buon " " aer switching on the device to start the meas-
urement. The current sound level reading is shown in the display aer about one
second. The reading changes if the noise level uctuates.
Minimum and maximum funcon:
Press the "MIN/MAX" buon. "MIN" or "MAX" is shown in the display. If you now
take the next reading, either the minimum or the maximum reading from the
current measurement is shown, depending on which mode (MIN or MAX) the
device is in. The current data is retained unl the corresponding value is exceeded
or falls below. Press the "MIN/MAX" buon to change or end the funcon.
Hold funcon:
Press the "Hold" buon to retain the current reading. The HOLD funcon is acve
as long as "HOLD" is shown in the display. Press the buon again to switch o the
funcon.
LCD backlight:
Briey press the ON/OFF buon" ". The backlight of the display is then
switched on. Press the buon again to switch o the light.
Switch o:
The meter automacally switches o if it is not used for 10 minutes. Alternavely,
you can press the ON/OFF buon " " for 2 seconds to switch o. Press the ON/
OFF buon " " for 3 seconds to switch on.
15


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